Low-Noise, 8-Channel, 24-Bit Analog Front-End for Biopotential Measurements - ADS1299

ADS1299 (ACTIVE)

Low-Noise, 8-Channel, 24-Bit Analog Front-End for Biopotential Measurements

 

Description

The ADS1299 is a low-noise, multichannel, simultaneous-sampling, 24-bit, delta-sigma (ΔΣ) analog-to-digital converter (ADC) with a built-in programmable gain amplifier (PGA), internal reference, and an onboard oscillator. The ADS1299 incorporates all commonly-required features for electroencephalogram (EEG) applications.

With its high levels of integration and exceptional performance, the ADS1299 enables the creation of scalable medical instrumentation systems at significantly reduced size, power, and overall cost.

The ADS1299 has a flexible input multiplexer per channel that can be independently connected to the internally-generated signals for test, temperature, and lead-off detection. Additionally, any configuration of input channels can be selected for derivation of the patient bias output signal. The ADS1299 operates at data rates from 250 SPS to 16 kSPS. Lead-off detection can be implemented internal to the device, either with an external pull-up or pull-down resistor or an excitation current sink or source.

Multiple ADS1299 devices can be cascaded in high channel count systems in a daisy-chain configuration. The ADS1299 is offered in a TQFP-64 package specified from –40°C to +85°C.

Features

  • Eight Low-Noise PGAs and Eight High-Resolution Simultaneous-Sampling ADCs
  • Very Low Input-Referred Noise:
    1.0 µVPP (70-Hz BW)
  • Low Power: 5 mW/channel
  • Input Bias Current: 300 pA
  • Data Rate: 250 SPS to 16 kSPS
  • CMRR: –110 dB
  • Programmable Gain: 1, 2, 4, 6, 8, 12, or 24
  • Unipolar or Bipolar Supplies:
    • Analog: 4.75 V to 5.25 V
    • Digital: 1.8 V to 3.6 V
  • Built-In Bias Drive Amplifier,
    Lead-Off Detection, Test Signals
  • Built-In Oscillator
  • Internal or External Reference
  • Flexible Power-Down, Standby Mode
  • Pin-Compatible with the ADS1298IPAG
  • SPI™-Compatible Serial Interface
  • Operating Temperature Range: –40°C to +85°C

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Parametrics Compare all products in Electrocardiogram (ECG)

 
# Input Channels
Analog Voltage AVDD (Min) (V)
Analog Voltage AVDD (Max) (V)
Integrated Features
Gain Drift (Typ) (ppm/degC)
Architecture
Gain Error (Typ) (%)
Input-referred Noise (Typ) (uVpp)
IDVDD Supply Current (Typ) (mA)
Digital Supply (Max) (V)
Digital Supply (Min) (V)
Reference Mode
Interface
Offset Error (Typ) (uV)
Rating
Operating Temperature Range (C)
Package Group
IAVDD Supply Current (Typ) (mA)
INL (Typ) (ppm)
Offset error drift (Typ) (uV/C)
PGA Gain (Typ) (V/V)
Power/Channel (Typ) (mW)
Approx. Price (US$)
ADS1299 ADS1191 ADS1192 ADS1291 ADS1294 ADS1296 ADS1298
8    1    2    1    4    6    8   
4.75    2.7    2.7    2.7    2.7    2.7    2.7   
5.25    5.25    5.25    5.25    5.25    5.25    5.25   
Daisy-Chainable
GPIOs
Oscillator
PGA   
Daisy-Chainable
GPIO
Oscillator
PGA   
Daisy-Chainable
GPIO
Oscillator
PGA   
Daisy-Chainable
GPIO
Oscillator
PGA   
Daisy-Chainable
GPIO
Oscillator
PGA   
Daisy-Chainable
GPIO
Oscillator
PGA   
Daisy-Chainable
GPIO
Oscillator
PGA   
2    5    5    2    5    5    5   
Delta-Sigma    Delta-Sigma    Delta-Sigma    Delta-Sigma    Delta-Sigma    Delta-Sigma    Delta-Sigma   
0.1    0.5    0.5    0.1    0.2    0.2    0.2   
1    24    24    8    3    3    3   
0.5    0.75    0.75    0.75    0.5    0.5    0.5   
3.6    3.6    3.6    3.6    3.6    3.6    3.6   
1.8    1.7    1.7    1.7    1.65    1.65    1.65   
Int
Ext   
Int
Ext   
Int
Ext   
Int
Ext   
Int
Ext   
Int
Ext   
Int
Ext   
Serial SPI    Serial SPI    Serial SPI    Serial SPI    Serial SPI    Serial SPI    Serial SPI   
60    15    15    100    500    500    500   
Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog   
-40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85
0 to 70   
-40 to 85
0 to 70   
-40 to 85
0 to 70   
TQFP    TQFP
VQFN   
TQFP
VQFN   
TQFP
VQFN   
NFBGA
TQFP   
NFBGA
TQFP   
NFBGA
TQFP   
7.14    0.2    0.2    3    2.75    2.75    2.75   
8    15    15    2    8    8    8   
0.09    5    5    2    2    2    2   
1
2
4
6
8
12
24   
1
2
3
4
6
8
12   
1
2
3
4
6
8
12   
1
2
3
4
6
8
12   
1
2
3
4
6
8
12   
1
2
3
4
6
8
12   
1
2
3
4
6
8
12   
5.125    0.335    0.335    0.35    0.75    0.88    0.75   
36.00 | 1ku    2.95 | 1ku    3.85 | 1ku    3.75 | 1ku    11.95 | 1ku    17.95 | 1ku    23.95 | 1ku   

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